2.Manual of Military Aviation by Hollis Leroy Müller (1917)"Turnbuckles must be similarly safetied. It is bad practice to employ the same
length of wire for ... Each turnbuckle must be safetied individually. ..."

3.Manual of Military Aviation by Hollis Leroy Müller (1917)"Each turnbuckle must be safetied individually. Turnbuckles should be inspected
for hammer marks, scoring or other indication of straightening or abuse. ..."

4.Granville: Tales and Tail Spins from a Flyer's Diary by Granville Guttersen (1919)"... and he took a look at a coupling (never before examined) and found both cotter
pins out and also, of course, the wire that safetied the cotter pins. ..."